Trimapanel® flat
Specification details for Trimapanel® flat

EN-Construction-Overview of Trimapanel® flat

Jaguar Land Rover showroom Stafford tata steel construction walling

Insulated, secret-fix, smooth faced wall panel that provides a high-end architectural appearance

Trimapanel® flat is an insulated, secret-fix, smooth faced wall cladding that is quick and easy to install for fast build times. Available in 70mm, 90mm and 120mm insulation thicknesses and bespoke lengths up to 12m to minimise waste and provide U-values down to 0.17W/m2K.

Trimapanel® flat is available in Colorcoat HPS200 Ultra® pre-finished steel in a range of sizes, shapes and colours, and the extensive fabrication options, offers a design flexibility that enables architects to create unique and modern design solutions.

The panel can be laid vertically or horizontally. The unique secret-fix joint design allows primary fixings to be hidden from view, which combined with the panel’s flat surface provides outstanding smooth external aesthetics.

If you have any questions or for further information click here to contact us.

EN-Construction-Benefits of Trimapanel® flat


Provides modern, high-end aesthetics

  • Unique secret-fix joint design allows primary fixings to be hidden from view, which combined with the smooth flat face provides outstanding external aesthetics.
  • Flexible design allows vertical and horizontal panel installation.
  • Available with a wide range of flashing options, ancillaries, integrated window, integrated louvre, fabricated corner and curved panel options

Performance guaranteed

Independent product verification for risk free specification

  • Approved to FM Class 4880 and 4881 to an unlimited wall height.
  • LPCB (Loss Prevention Certification Board) approval to LPS 1181 Part 1 helps reduce insurance premiums and assures reaction to fire performance.
  • Fire resistance performance of 15 mins insulation and 4 hours integrity achievable with enhanced fixing methods (horizontally or vertically laid).
  • Manufactured in factory conditions operating to quality management standard BS EN ISO 9001:2015, environmental management standard BS EN ISO 14001: 2015 and occupational health and safety management scheme BS EN ISO 18001:2007.
  • Product specification and performance in accordance with BS EN 14509, European Product Standard for CE Marking.

Excellent sustainability credentials

  • Lower air permeability of the system reduces energy costs, carbon emission rates and facilitates compliance with Building Regulations (Part L2 & TH 6).
  • Full traceability of all component materials and certified ‘very good’ to BRE’s responsible sourcing standard BES 6001.


EN-Construction-System information of Trimapanel® flat

System information

Basic technical data

Thickness (mm) 70, 90, 120
Maximum length (mm)   12000
Minimum length (mm)
On-line* 2400
Off-line 300
Weight based on thickness in mm (kg/m2)
70 11.89
90 12.67
120 13.85

Panel manufacturing tolerances*Panels ordered below the minimum on-line length will require off-line cutting and will be subject to a surcharge.

(L = length of measurement between high points)
For L = 200mm, 0.6
For L = 400mm, 1.0
For L > 700mm, 1.5
Cover width (mm) +/- 2
Thickness (mm) +/- 2
Squareness (mm) < 6  
Length (mm) < 3m +/- 6
Length (mm) > 3m +/- 10

Tolerance is in accordance with BS EN 1450

EN-Construction-Thermal and fire performance of Trimapanel® flat

Thermal and fire performance

The Trimapanel® flat system complies with the minimum requirements of the Conservation of Fuel and Power sections of the Building Regulations, Approved Document Part L2, England and Wales and Technical Handbook – Scotland. The panel construction offers highly consistent insulation performance, and the site-formed junctions provide a practical and effective method of ensuring good thermal performance.   

Thickness (mm) U-value (W/m2K)*
70 0.31
90 0.24
120 0.17


Fire safety

The Trimapanel® flat system has been tested to LPS1181-1 and is LPCB approved to both Grades EXT-B and EXT-A. Fire resistance performance of 15 mins insulation and 4 hours integrity is also achievable with enhance fixing and methods, contact the technical department for details.

The panel achieves an internal surface reaction to fire Class B s2 d0 rating in accordance with BS EN 13501-1.

Following rigorous structural and fire performance testing with FM Global, Trimapanel® panels have achieved FM Approvals certification to the following stringent standards:

4480: Class 1 Insulated wall and ceiling panels

4481: Class 1 Exterior wall systems (unlimited height)

Specifying and installing FM Approved products will provides assurance that the products have been objectively tested and confirm to the highest international standards. FM Approved roof and wall panel’s means you can be confident that your building envelope will withstand a broad range of fire and environmental risks and be safe throughout its lifecycle.

To obtain the correct fire specification for your project please click here to contact us.

EN-Construction-Acoustic performance of Trimapanel® flat

Acoustic performance

The acoustic performance of the Trimapanel® flat system has been predicted using software developed by the Department of Applied Acoustics, University of Salford, under a research contract funded by the Metal Cladding and Roofing Manufacturers Association (MCRMA). The results below are based on a 70mm core.

Frequency (Hz) SRI Values (dB)* Frequency (Hz) SRI Values (dB)*
100 12.5 800 27.6
125 14 1000 29.3
160 15.7 1250 31
200 17.3 1600 33
250 20.6 2000 34.7
315 22.4 2500 36.5
400 24 3150 36.7
500 25.8 4000 34.6
630 27.6 5000 32.1

*The predicted sound reduction index values should only be used to provide guidance for preliminary design and/or appraisal of cladding systems.Weighted S.R.I Rw = 28.9dB

EN-Construction-Download Trimapanel® flat BIM Objects

Download BIM Objects

BIM: The way you want it

The DNA Profiler has been designed to allow you to access Tata Steel’s product information (3d parametric objects & data) how you want, when you want, to the level of detail you want, in the format you want.

Product Name Link
Trimapanel Micro Rib 70mm BIM DNA Profiler

In addition to our DNA Profiler, you can access our BIM content at BIMobject here or alternatively follow the links on our individual product pages on this website.

bim object tata steel construction

In addition to our DNA Profiler, you can access our BIM content at

Product Name Link
Trimapanel® micro-rib insulated wall panels BIM Object



EN-Construction-Trimapanel® flat Downloads


Find related downloads below for your project specification:

EN-Construction-Book a CPD

Book a CPD

We offer a range of face to face and online CPDs aimed at Engineers and Architects

These free seminars can be booked at any time between 9am and 5pm. Our online webinars can all be delivered via Skype for Business and Teams, but we can consider other platforms if this will not work for your practice.

Below outline the CPDs we have available - Book yours today

  • Decarbonising your structural hollow section designs
  • Essentials of Structural Hollow Sections
  • Welded Joints in Tubular Steelwork - Eurocode 3 Part 1-8
  • Concrete Filled Hollow Sections - Composite Design – Eurocode 4
  • Composite Floor Deck in Construction
  • Structural Roof Deck in Construction
  • Specifying metal clad envelope systems in accordance with ADB2 of the building regulations and the value of large scale system testing
  • RIBA 2030 climate challenge: How steel building envelope solutions contribute
  • Pre-finished steel standing seam systems for roof & wall cladding
  • CDM regulations 2015 and their impact on steel building envelope specification.
  • Steel building envelope systems for non-domestic buildings
  • Steel for roof and wall cladding

Book your CPD today